Gardiner is a Dispersed Rural Community and unincorporated place in geographic Blount Township, Cochrane District, Ontario, Canada. It is approximately 30 km north of the town of Cochrane, and is the northern terminus of Ontario Highway 579. The community is also astride the Ontario Northland Railway line from Cochrane to Moosonee, but is not served by Polar Bear Express passenger trains. There is also a geographic Gardiner Township in Cochrane District about 150 km northwest of the community.